We are still having electric problems with our truck. I checked with a meter, 12.93v of draw with everything shut off. This how I did it let me know if procdure was wrong.

Pulled the positive cable off the pass. side batt, pulled the positive cable from the driver side batt. Used a meter set to read volts on the driver side battery, one cable conected too the batter and one conected too the battery cable. Pulled every fuse and relay one by one to try to find the system with the problem. No change ever. Didnt pull air bag fuses for obvious reasons.

Any ideas where too look?

 

Your doing everything right, except you need to be measuring amps, not volts.

 

DOH! But should there be a 12V draw with nothing on like that?

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Nevermind dumb question......

Just realized i was basiclly checking the charge on the battery by using volts!!!

Thank god it's friday I am fried

 

If you put an one ohm resistor in line with your test lead it will change your volt meter into an amp meter. Just make sure it is not drawing a lot of current when you do it.

 

Okay here where we stand.

After an hour trying to figure out the fuse in the stupid meter i got some results.

0.01 AMP is a constaint draw.

Flipped on the dome light 3.0 AMP draw
Flipped on the key to let the LP and grid heater run 18.0 AMP draw.
Turned off key 0.25 AMP draw for approx 3 to 4 mins than back to 0.01 AMP draw.

Both batteries checked out with load tester..... Stuip thing goes dead in like day and a half.

Any input other test to try?

 

That's nothing for a draw. When you say batteries goes dead, does it crank a bit or do you hear just a click? Could be starter contacts???

 

Good thought, but the batt gauge reads no volts.

 

What kind of load tester and what method was used to determine the batteries were good? They were tested individually, correct?

 

I dunno what type, some cheapy proberly knowin my boss and correct tested individully. Kinda thinking that the load tester is bad, just said my buddies honda civic had 1000 cca's after 10seconds. That cant be right HAHA

 

Make sure all of your terminals, grounds, and connection on the starter are clean from corrosion and tight, If your battery guage is readin 0 all the time sounds like juice isn't gettin from batteries to starter